Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995ap%26ss.224..455e&link_type=abstract
Astrophysics and Space Science, Volume 224, Issue 1-2, pp. 455-456
Astronomy and Astrophysics
Astrophysics
Flare, Stars : Individual : X Oph
Scientific paper
Before the observation of the 1974 U Ori eruption, it was considered that the Mira stars had only some regular OH variations. With this eruption, we realized that sometimes flares can occur in this type of star. In the course of an OH Mira star monitoring programme with the Nançay radio telescope, we have discovered a new eruptive type of OH maser emission in several sources. Especially, in early 1992, we observed a quickly rising 1665 Mhz emission in the Mira X Oph. The main characteristics of this flare were: large flux variations independent of the light curve; large degree of circular polarization; radial velocity emission close to the stellar velocity.
Etoka Sandra
Le Squeren Anne-Marie
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